Enable Oilpan by default for webaudio/

Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 168 matching lines @@
         if (m_client)
             m_client->lock();
     }
     ~AudioSourceProviderClientLockScope()
     {
         if (m_client)
             m_client->unlock();
     }
 
 private:
-    RawPtrWillBeMember<AudioSourceProviderClient> m_client;
+    Member<AudioSourceProviderClient> m_client;
 #else
     explicit AudioSourceProviderClientLockScope(HTMLMediaElement&) { }
     ~AudioSourceProviderClientLockScope() { }
 #endif
 };
 
 static const AtomicString& AudioKindToString(WebMediaPlayerClient::AudioTrackKind kind)
 {
     switch (kind) {
     case WebMediaPlayerClient::AudioTrackKindNone:
@@ skipping 3789 matching lines @@
 
 #if ENABLE(WEB_AUDIO)
 void HTMLMediaElement::clearWeakMembers(Visitor* visitor)
 {
     if (!visitor->isAlive(m_audioSourceNode) && audioSourceProvider())
         audioSourceProvider()->setClient(0);
 }
 #endif
 
 }